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1.
"Pounds So F*cking Hard"
"Pounding So F*cking Hard"

In reference to a sick beat.
That DJ in the club knows how to get it PSFH!!

This new mashup PSFH!
by MusSpin March 10, 2011
 
2.
it be a leaking pipe
the pipe broke
"psfh"
by Anjew Apu-Llama July 17, 2003